//**************************************
// Name: Capture Screen (C#)
// Description:This is an almost direct C# translation of the VB.NET "Capture Screen" submission by Masoud (M.D) at http://www.planetsourcecode.com/vb/scripts/ShowCode.asp?txtCodeId=309&lngWId=10
// By: Jon Davis
//
//This code is copyrighted and has// limited warranties.Please see http://www.Planet-Source-Code.com/vb/scripts/ShowCode.asp?txtCodeId=1663&lngWId=10//for details.//**************************************

using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace PlanetSourceCode
{
	/// <summary>
	/// Summary description for ScreenShotView.
	/// </summary>
	public class ScreenShotView : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;
		public ScreenShotView()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();
			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if(components != null)
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}
//Private Declare Function CreateDC Lib "gdi32" Alias "CreateDCA" (ByVal lpDriverName As String, ByVal lpDeviceName As String, ByVal lpOutput As String, ByVal lpInitData As String) As Integer
		[DllImport("gdi32.dll")]
		private static extern int CreateDC(string lpDriverName, string lpDeviceName, string lpOutput, string lpInitData);
//
//Private Declare Function CreateCompatibleDC Lib "GDI32" (ByVal hDC As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int CreateCompatibleDC(int hDC);
//
//Private Declare Function CreateCompatibleBitmap Lib "GDI32" (ByVal hDC As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int CreateCompatibleBitmap(int hDC, int nWidth, int nHeight);
//
//Private Declare Function GetDeviceCaps Lib "gdi32" Alias "GetDeviceCaps" (ByVal hdc As Integer, ByVal nIndex As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int GetDeviceCaps(int hdc, int nIndex);
//
//Private Declare Function SelectObject Lib "GDI32" (ByVal hDC As Integer, ByVal hObject As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int SelectObject(int hDC, int hObject);
//
//Private Declare Function BitBlt Lib "GDI32" (ByVal srchDC As Integer, ByVal srcX As Integer, ByVal srcY As Integer, ByVal srcW As Integer, ByVal srcH As Integer, ByVal desthDC As Integer, ByVal destX As Integer, ByVal destY As Integer, ByVal op As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int BitBlt(int srchDC, int srcX, int srcY, int srcW, int srcH, int desthDC, int destX, int destY, int op);
//
//Private Declare Function DeleteDC Lib "GDI32" (ByVal hDC As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int DeleteDC(int hDC);
//
//Private Declare Function DeleteObject Lib "GDI32" (ByVal hObj As Integer) As Integer
		[DllImport("gdi32.dll")]
		private static extern int DeleteObject(int hObj);
//
//Const SRCCOPY As Integer = &HCC0020
		const int SRCCOPY = 13369376;
//
//Private oBackground As Bitmap
		//private Bitmap oBackground;
//Private FW, FH As Integer
		private int FW, FH;
		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			// 
			// ScreenShotView
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(416, 342);
			this.Name = "ScreenShotView";
			this.Text = "ScreenShotView";
			this.Load += new System.EventHandler(this.ScreenShotView_Load);
		}
		#endregion
//		Protected Sub CaptureScreen()
		protected Bitmap CaptureScreen() {
//
//Dim hSDC, hMDC As Integer
			int hSDC, hMDC;
//Dim hBMP, hBMPOld As Integer
			int hBMP, hBMPOld;
//Dim r As Integer
			int r;
//
//hSDC = CreateDC("DISPLAY", "", "", "")
			hSDC = CreateDC("DISPLAY", "", "", "");
//hMDC = CreateCompatibleDC(hSDC)
			hMDC = CreateCompatibleDC(hSDC);
//
//FW = GetDeviceCaps(hSDC, 8)
			FW = GetDeviceCaps(hSDC, 8);
//FH = GetDeviceCaps(hSDC, 10)
			FH = GetDeviceCaps(hSDC, 10);
//hBMP = CreateCompatibleBitmap(hSDC, FW, FH)
			hBMP = CreateCompatibleBitmap(hSDC, FW, FH);
//
//hBMPOld = SelectObject(hMDC, hBMP)
			hBMPOld = SelectObject(hMDC, hBMP);
//r = BitBlt(hMDC, 0, 0, FW, FH, hSDC, 0, 0, 13369376)
			r = BitBlt(hMDC, 0, 0, FW, FH, hSDC, 0, 0, SRCCOPY);
//hBMP = SelectObject(hMDC, hBMPOld)
			hBMP = SelectObject(hMDC, hBMPOld);
//
//r = DeleteDC(hSDC)
			r = DeleteDC(hSDC);
//r = DeleteDC(hMDC)
			r = DeleteDC(hMDC);
//
//oBackground = Image.FromHbitmap(New IntPtr(hBMP))
			Bitmap ret = Image.FromHbitmap(new IntPtr(hBMP));
//DeleteObject(hBMP)
			DeleteObject(hBMP);
			return ret;
//
//End Sub
			}
		private void ScreenShotView_Load(object sender, System.EventArgs e) {
			this.BackgroundImage = CaptureScreen();
		}
	}
}